It's definitely going to snatch away the freedom of keeping your transactions to yourself while you're bound to show everything in the books once regulations are implemented, so for the Governments to start levying taxes. Just like israt1@ said, complete decentralization can never be achieved as it wasn't in full even before crypto was in talks. Though things get centralized, it's in the good for crypto because without the country-wide support for crypto, we won't be able to achieve the goals that was set by Satoshi, to make crypto available and easy to use as well as friendly for anyone in this world.
Although we can't be hopeless seeing the market will totally consider as a form of currency but somehow, the situation is changing a lot especially when the government will become strongly attached to the crypto world. Now that they have the interest in regulating the market and tracking our transactions, the more chances of losing the anonymity feature that crypto has.
Like those countries who legalize Bitcoin now, let see what is going to happen with them. For now, we can't just say bad to it unless we are witnessing bad things happen to them first as this will possibly going to happen in the other country as well.